Question

(x+3)(x+7) Using algebraic identity Please send answers fast

Answer 1

Answer:

$21x^{4}$ + 21

Step-by-step explanation:

(x+3)(x+7)

First you use the x in the first equation to multiply the second equation which will be $x^{2}$ +7x.

Next you use 3 to multiply the second equation which will be 3x+ 21 all together that will be

$x^{2}$ + 7x multiplied by 3x+ 21 which will go like this

$7x^{3}$ x 3x +21

$21x^{4}$ + 21 which will be your answer

Thank you